When developing, how do you keep an eye out for multiple installed instances? Look at all of the things that are interrelated;

- modversion['name']
- subdirectory name
- table names in /sql
- constants in language/[yourlanguage]/


One variable
Is there one variable that would always be available whether executing .php in the base module directory as well as admin/ ?

table names
Short of editing the table names in the SQL directory how would table names be converted?

Are there any individual modules that have solved this problem?